Pipe-bending apparatus.



R. L. DAVIS & G. c. MOYERS.

- PI'PE SENDING APPARATUS. APPLICATION FILED JUNE 9.19l6.

Patented Sept. 4, 1917.

1223991 3 SHEET SSHEET l INVENTORS RAY L. DAVIS R. L. DAVIS & G. C. MOYERS.

PIPE BENDING APPARATUS.

APPLICATION FILED JUNE 9. 19m.

3 SHEETS-SHEET 2.

mwwwows RAY L. DAVIS G Y C. OYERS Patented $9M.- 4, 1917.

R.'L. DAVIS & G. C. MOYERS PIPE BENDING APPARATUS.

APPLICATION FILED muss. 1916.

1 $39 1 65., Patented Sept. 4, 191?.

3 SHEETS-SHEET 3.

INVENTQIRE? RAY L. DAVIS snares rarest anion RAY L. avis AND GUY c. Morass, or wrrnnnrne,,wnsr vraernra. H

. rIrnnnpme APPARATUS.

Tosall w'hom-it-mayicoacem."

Be it known that we, RAY L; DAVIS and o .@L-MYERS, citizens of. the United of which the following is a specification;

This invention relates "broadly to? pipe bending devices, and it has for its primary object 1 to: provide apparatus-i whereby accurate bends may be formed in pipes,-lead cables, rod-s and the like. a I

A further object is to: simplify and -struetura'lly improvethe pipe: bending apparatus disclosed in UnitedStates: Patent No; 1,16%893, granted to us on thell th day of January, 1916. w

In describing theinventiion detail, ref}- erenee is herein had: to. the accompanyiling drawings, in Which.: a p

m Figure 1 a1 frontsiide elevation of the invention: showing the same designed for mounting upionx table or worlebench 2- is azi rearside elevation of the invention, showing the samel mounted upon legs; a Fig. 3 is a detail view frontelevation ofthe' plugehoard, showing an arrangement of plugs for forming a short bend in apipe Fig. 4%. is an edge viewof theinvent'ion as disclosed in. 1;. a i

Fig. 5$is a viewsimilar toFig; 4:, looking in the opposite direction;

Fig. 6.- is a section on: line: 6%.6', Fig. 2; Fiig; 7 is an enlargedinner" face view of a r e; a i i Fig. 8 is a partial sectional view illustratin-g means for producing 90 degree curves of greaterra'dius than that of the bending wheel;.' H

Fig. 9 is anrlen'larged section on =l1ne 99, Figi8; V

Fig. .10 is anenlarged sectional elevatlon illustrating therapplieation of-the adyustabrle stop; i a

Fig. 11 is an enlarged section on line 1111, Fig. 10;

Fig. 12 is an enlarged detail section ofthe wheel-lookingmechanism; LI1d--:.-

Fig.; 13: is adetailsection ofthe leverhandle coupling, a I

Referringto said drawings, in which like Sacr -lean of Letters-Batent.

Application filed June 9; 19I6. Serial No". 102,695.

Patented Sept. a, ran.

designating characters distinguish like parts throughout the several views- :liindicates a wheel, hereinafter termed a bending wheel; which is rotatably mounted upion a shaftor spindle 2 having its ends fixed inthe upright members 3 of a yoke like support 4;; which either may be carried by a bracket 5 adapted for-attachment to a wall oriwork-bench, as shown in Figs..1, d and 5, orgmayhave the form shown at et in Figsw2 and 6. wherein it is designedfor mounting upon supporting legs 6.

- The bending. wheel 1 has a peripheral groove or channel 1 designed for-receiving thereinthe pipe, as 7 tovbe bent; and arranged to. cobperate with said wheel is a relatively small wheel 8 rotatable between the parallel arms 9 and 10: of a yoke 11, saidarmQ having a greater length than the an 10 and being rotatably mounted on the axle -2 upon which the bending wheel is mounted.

The bending wheel 1 has a lateral extension 12 formed -thereon at a suitable point, and provided in said extension is a vertical threaded bore 13 in which is mounted the lower threaded end of an adswiveledin a block 15 which overlies said wheel 1 and constitutes the movablej-aw of a vise. of which said wheel, with its eX- tension 12, constitutes the companion Said adjusting screw 14: has a horizontal arm or lever 16 attached to its upper end whereby itmay be rotated for adjusting the aw 15 with respect to the periphery of the bending wheel. Suitable means, as a guidepin 17'carried by the movable jaw 15 and vertically movable Gina vertical bore18 in the extension, or lower jaw, is provided for guiding said movable jaw in its movements. In practice, said movable jaw isacljusted with respect to. the. wheel 1 for rigidly clamping in place on: the latter the pipe to be bent, saidpipe being disposed in a horizontal position, asshown in Figs. land 2, and having a portion thereof closely underlying aplug 19 which is removably mounted in" an appropriate position in an upright plug-board 20 whichis rigidly mounted, as by means of bolts 21, upon the rear. face of the bending wheel and which lies in a plane parallel to said wheeLd Saidboard, in the lusting screw 14 having a portion thereof normal working position of the device, occupies an upright position parallel to the adjusting screw 14, asshown in Figs. 1 and 2.

An operating lever- 22 is attached to the bend the latter over the periphery of the:

wheel 1,as shown in dotted lines in'Fig. 1. Due to the fact that the arm 9 and wheell are mounted upon the same shaft or axle, the wheel 8 will obviously. be maintained throughout its movement at an even distance from the periphery of said wheel 1. Two or more sets of holes for thepin 23 upon which the wheel 8 is mounted are provided in the yoke arms 9 and 10, thus providing for adjustment of said wheel to suit the size of the pipe to be bent.

An adjustable gage arm 24 is provlded whereby the bending. action is stopped at a predetermined point, said arm being loosely mounted upon the axle 2 and having its outer end turned laterally across the periphery ofthe wheel 1 and carrying anupwardly inclined lug or sto 25 having its outer face disposed tangential with respect to and lying in the groove of the wheel 1.

Said arm is adjusted to a predetermined position,.whereupon a taper-pin 26 is directed through said arm into seating relation to one of. a plurality of pin holes orsockets 27 provided therefor in the bending wheel,

whereby said arm is rigidly maintained in fixed relation to said-wheel, as. shown in Fig. 10. i

To adapt the'devlce for the production of 1 regular bends having a radius approximating, but greater than, that of thebending wheel,arc-shaped detachable shoes '28 of varying thicknesses may be provided, said I shoes being of substantially crescent shape in cross section, as shown in Fig. 9, havlng their under sides shaped to seat inthe circumferential groove or channel 1 of wheel 1 and having their outer faces respectively providedwith a channel adapted to snugly receive therein a pipe of a certain size. The shoe has a radially projecting pin 29 fixed on its under side adjacent to its upper end adapted to seat in a socket 30 provided therefor in the wheel 1, whereby said shoe is held in seated position.-

The bendingwheel 1 has a plurality of laterally disposed spacedzteeth 31 formed on the front face thereof adjacentto its periphery, and normally disposed between two of the lowermost of said teeth is the upper end of a rod 32 whereby said wheel is locked against rotation. Said locking rod is mounted in and movable through a suitable part of the head of the yoke-like support 4: and is normally held in the upwardly-thrust wheel-locking position aforebreakat the threads thereof is practically said by means of a suitably arranged spring, as the spring 34shown in Fig. 12. A suitable foot-operated lever or treadles33 is connectcd in an appropriate manner, as by a chain 35, to the lower end of said rod whereby the latter may "be drawn'do-wnward to release said .wheel.

When a bend has been formed in a pipe which utilizes the limit of the throw of the lever 22, and it is desired'to produce a bend of still greater length, the bending wheel may be rotated forward a suitable distance and the said lever again-depressed the requisite distan'cer i As is obvious, the whole mechanism sustained by the axle 2. may be swung tothe position indicated in'dotted lines inrFig. 2 and in full lines in Fig. .3, as .when it isdesired to position the plug-board for hand-bending ofpipes. a

A gage is provided .wherebythe length of bend to be formed at'theiendnof. appipe may be accurately gaged. Said gage'consists' of a graduated rod 36 having"an end pivotally connected to the face of the extension 12 and which .is adapted to beflsupported by a stationary pin 37 or equivalent device'in a horizontal position, asfshown in,-Fig. 1. When not in use said gagemay be swung over to occupy a. suspended vertical out-ofthe-way position; The 'graduations employed on the rod 36 may beofany appropriate character, as in inches and fractions of inches measured, outward from thecenter line of the .vise, as-'shown in Fig. 1. When the bend is to terminate at a given distance, asfor example, eighteen inches from the end of the pipe, the latter is posi tioned so that its end registers with the 18- inch mark or graduationgon the rod, after which said rod is swung to. its out-of-the w'ay position aforesaid. o 1 c a In order toprevent the breakage which frequently results from the great strains imposed upon the operating lever 22, a novel form of coupling is provided :whereby said lever is connected to the yoke 11, as shown in. Fig.13... .The arm .llao'f said yoke has a stub end 38 of such a reduced thickness .ordiameter that the same is snugly receivable within the threaded end of the tubular lever 22 which is commonly employedrhSaidthreaded end of the lever is threaded within the end of a union 39 rwhic'h has its opposite end mounted on the threaded portion 40 of said arm adjacent to saidstub end..- As a result-of the additional bearing afforded by 3 said stub end, the tendency of the lever. to

eliminated.

1 What is claimed is V A pipe bending apparatus comprising a support, a circumferentially grooved bending wheel rotatable on saidv support, means A for clamping a. pipe in-the groove Wheel, means mounted on the axis of said bending movement and means for securing Wheel and adapted for movement adjacent said arm in adjusted position. to the periphery of the latter whereby the In testimony whereof We affix our signapipe is bent about said periphery, a gagetures in presence of two Witnesses.

5 arm rotatable on said axis, a lug-like member carried by said arm disposed in the groove of said wheel and having its outer face disposed tangentially with respect to Witnesses:

said groove, said face being adapted to have H. E. DUNLAP, 10 the pipe abut thereagainst for limiting the W. F. KEEFER.

Copies of this patent inay be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

